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王康康,高飞,杨凯,耿萌萌,刘皓,范茂松,张明杰.锂离子电池电化学性能及阻抗参数的Arrhenius特性分析[J].稀有金属材料与工程(英文),2019,48(4):1208~1212.[wangkangkang,gaofei,yangkai,gengmengmeng,liuhao,fanmaosong and zhangmingjie.Arrhenius properities of electrochemical performance and impedance parameters of lithium ion batteries[J].Rare Metal Materials and Engineering,2019,48(4):1208~1212.]
Arrhenius properities of electrochemical performance and impedance parameters of lithium ion batteries
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Received:August 31, 2017  Revised:January 08, 2018
DOI:
Key words: LiFePO4 battery  electrochemical impedance  Arrhenius relation  ion diffusion coefficient
Foundation item:国家自然科学基金资助(项目号DG71-14-043),国家电网公司科技项目(项目号DG71-15-037)
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wangkangkang,gaofei,yangkai,gengmengmeng,liuhao,fanmaosong and zhangmingjie  
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Abstract:
      The influence of ambient temperatures on charging capacities of 18650 type LFP and NCA batteries were investigated in this paper, and the performance in low temperature was compared. Electrochemical impedance measurements were taken in various temperatures, the values of ohm, film and charge transfer resistances were confirmed according to equivalent circuits. As for LFP batteries, ohmic resistance and film resistance are well meet the Arrhenius relations in the range of -10~25 ℃, however, in a wider range of -10~50 ℃ charge transfer resistance is well meet. However, as for NCA batteries, film resistance and charge transfer resistance are complyed with Arrhenius relations in range of 0~50 ℃. The comparison analyses of solid phase ion diffusion coefficient in different temperatures indicate that the ion diffusion rate of LFP battery is obviously affected by low temperatures, nevertheless, slightly affected for the NCA battery.